2013/04/17 0:00, Toshi Kani wrote:
On Tue, 2013-04-16 at 10:10 +0900, Yasuaki Ishimatsu wrote:
When hot removing memory presented at boot time, following messages are shown:
:
The reason why the messages are shown is to release a resource structure,
allocated by bootmem, by kfree(). So when we release a resource structure,
we should check whether it is allocated by bootmem or not.
But even if we know a resource structure is allocated by bootmem, we cannot
release it since SLxB cannot treat it. So for reusing a resource structure,
this patch remembers it by using bootmem_resource as follows:
When releasing a resource structure by free_resource(), free_resource() checks
whether the resource structure is allocated by bootmem or not. If it is
allocated by bootmem, free_resource() adds it to bootmem_resource. If it is
not allocated by bootmem, free_resource() release it by kfree().
And when getting a new resource structure by get_resource(), get_resource()
checks whether bootmem_resource has released resource structures or not. If
there is a released resource structure, get_resource() returns it. If there is
not a releaed resource structure, get_resource() returns new resource structure
allocated by kzalloc().
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
---
v2:
Based on following Toshi's works:
Support memory hot-delete to boot memory
https://lkml.org/lkml/2013/4/10/469
resource: Update config option of release_mem_region_adjustable()
https://lkml.org/lkml/2013/4/11/694
Added a NULL check into free_resource()
Remove __free_resource()
Thanks for the update. Looks good. Can you also address Rui's comment?
Thank you for your review.
Of course I'll update Rui's comment.
Thanks,
Yasuaki Ishimatsu
-Toshi
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